Timer&temperature in nRF52840

Question

I want to implement the function of periodic temperature collection，but I didn`t find any data show in putty terminal，and I`ve set NRFX_TIMER_ENABLED 1 NRFX_TIMER0_ENABLED 1.

Is there something wrong with my code?

#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"
#include "nrf_drv_timer.h"
#include "bsp.h"
#include "app_error.h"


#include "E:/BaiduNetdiskDownload/nRF5_SDK_15.2.0_9412b96/nRF5_SDK_15.2.0_9412b96/components/libraries/delay/nrf_delay.h"
#include "nrf_temp.h"
#include "app_error.h"


#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(0);

/**
 * @brief Handler for timer events.
 */
void timer_led_event_handler(nrf_timer_event_t event_type, void* p_context)
{

    int32_t volatile temp;
    nrf_temp_init();
    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();
    NRF_LOG_INFO("Temperature example started.");

    NRF_TEMP->TASKS_START = 1; /** Start the temperature measurement. */
     while (NRF_TEMP->EVENTS_DATARDY == 0)
        {
         }
     NRF_TEMP->EVENTS_DATARDY = 0;
     temp = (nrf_temp_read() / 4);
     NRF_TEMP->TASKS_STOP = 1; 
     NRF_LOG_INFO("Actual temperature: %d", (int)temp);

}



int main(void)
{
    uint32_t time_ms = 500; //Time(in miliseconds) between consecutive compare events.
    uint32_t time_ticks;
    uint32_t err_code = NRF_SUCCESS;

    nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
    err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
    APP_ERROR_CHECK(err_code);
    time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
    nrf_drv_timer_extended_compare(
         &TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);

    nrf_drv_timer_enable(&TIMER_LED);

    while (1)
    {
        __WFI();
    }
}